Universal die sinker



' Dec. 12, 1939. J. M. RUSNAK UNIVERSAL DIE SINKER 2 Sheets-Sheet 1 Original Filed Oct. 12, 1937 INVENTOR Wile/K15 0812 1? I, A TORNEY Dec. 12, 1939. J. M. RUSNAK UNIVERSAL DIE SINKER Original Filed Oct. 12, 1937 2 Sheets-Sheet 2 I 15 head is mounted, this bearing cooperating with means to simultaneously rotate the eccentrics in" 25 application Serial No. 168,634 filed October 1'2, in any direction.

Patented Dec. 12, 1939 f I g T T M ENT. OFrjiCEf:

.John M. Rusnak, West Hartford, Conn., assignor to Niles-Ber'ncnt-Pond Company, Hartford, 001131 3 corporation of New Jersey Original application Octdber 1 2, 1937, Serial No. 168,634. Divided and this application January 25, 1939', Serial No. 252,806

6 Claims. (lCl. 90-14f) This invention relates to die sinking machines be made within the scope of the appended claims and particularly to a diesinking machine of the -without departing from the spirit of the inventype having means for actuating the cutter and tion. 1 V the head Within which the cutter is mounted in Briefly and in its broadest aspect, the invention 4 5 an arcuate path of different predetermined radii. may include the following principal parts: first, A primary object of the invention is to provide a base having acolum'n portion; second, .a head improved supporting and actuating means for the supported within a fixedupper part of the base movable-head within which the cutter or tool and movable in a vertical planein anydirection; spindleis slidably and rotatably mounted so that third, spaced adjustable eccentrics-rotatably supthe head can be actuated in a path of any. radius ported within the upper fixed portion of, said by hand or power means. base for moving the head inarcuate paths "while It is another object of the invention to pr o maintaining the axis of the cutterspindle at'all Y vide an improved bearing member in the mo'vatimes vertical; fourth, means to simultaneously ble head for one of the eccentrics on which the adjust the eccentricity of said eccentrics; 'fifth,

a fixed bearing in the head for the other ec'cenany adjusted position so that acutter mounted tric to prevent cramping or binding of the movat the lower end of said spindle may be moved in able head relative to its bearings during its movearcuate paths of any predetermined radii; sixth, ments in the arc of circles of any radius; an; integral cylindrical bearing formed in the I The features of construction formingthe presmovable head for engagement with one of said ent invention constitute improvements upon the eccentrics; and'seventh, an arcuate bearingmemdie sinking machine described and. claimed in her partially engaging the other of said e'ccenv the patent to Bayrer 1,354,942, granted October tries and supported adjustably within the head 5, 1920-; and this application isa division of my for limited free angular and linear movements 1937, Patent No. 2,161,683, June 6, 1939. Referring more in detail to thefigures of the With the above and other obiects'in view, the drawings, I provide a base Ill having a'column invention may include the features of 'construcportion H on which is adjustably mounted for tion and operation set forth in thefollowin'g vertical movement a work supporting bracket or specification and illustrated in the accompanying knee l2. Onthe upper horizontalsurface of this drawings. g I bracket or knee I2. is s'lidably mounted a saddle In the accompanying drawings annexed hereto I3 movable toward and from the column and and-forming apart of this specification, 1 have carrying a work supporting table. 14 movable shown the invention: embodied in amotor driven transversely thereon. A'work piece W being 011- f die sinking machine of the vertical spindle unierated on may be clamped in position on this 35 versal' type, but it will be understood that some of table M. The above described work supporting the features of the invention can be embodied in and positioning means are or may be those usually other machine tools and that the drawings are forming parts ofa standard die sinking machine not to be construed as defining or limiting the and may be'adjusted by means of hand wheels 40 scope of the invention, the claims appended to I5, H5 and I1 respectivelyior operating the knee 40' this specification being relied upon for. that purl2, saddle I3 and table l4'.- pose. i 1 The base H) at the upper end of the column por- In the drawings: tion II is in the form of a fixed head portion I8 Figure 1 is a complete side elevation of a die secured rigidly to the column H as shown. This I sinking machine in which the present invention fixed head l8 has suitable parallel side surfaces 45' is incorporated. v Q i between which'is movably mounted a cutter sup- Fig. 2- is an elevation taken centrally'through porting head 2|] presently to be more fully dethe tool supporting head and showing the bearscribed. Within this movablehea'd 28 is a verings for this'head in section, and tically disposed cutter-spindle 25 mounted ad- 5 Fig. 3 is a partial transverse sectional view -jacent one. end. Preferably and as shown'in the showing one of the eccentrics and its shaft. figures, this spindleZl is rotatable within a ver- In the above-,mentioned drawings there has tically adjustable sleeve 22' so that the spindle 2! been shown but oneembodiment of the invention may be vertically adjusted toward and from the which is now deemed preferable, bath is to be table M. .A cutter. or tool 23 may be clamped by understood thatchanges and modifications may any usualmeans within the lowerend of the .55

spindle 2i In order to effect vertical movements of the sleeve 22 and cutter spindle 2|, there is provided a vertical screw 24 engaging a nut 25 secured to an intermediate portion of the sleeve 22 so that by rotation of this screw 24 by anysuitable means (not shown) the sleeve 22 and spindle 2| may be moved up or down.

The movable head 20 mounting the cutter spindle 2i and sleeve 22 is supported upon eccentric sleeves 82 and 63 shown in section in Fig. 2.

These eccentric sleeves 62 and 63 are similar to each other and form parts of eccentrics of the compound type, there being two eccentrics, one within the other relatively adjustable to vary the eccentricity of the eccentric sleeve 62 or 63 relative to the axis of shafts -64 on which they are eccentric surfaces 66 and are supported in fixed positions for rotation within the fixed head portion It, there being a cover plate 68 rigidly fastened to the base and forming one side of the fixed head- H3 in order to permit assembly of these eccentrics. Closely surrounding each inner eccentric surface 65 is the eccentric sleeve 62 and 63. These sleeves have internal gear teeth 69 formed therein and meshing with the teeth of a pinion 70 upon the central portion of shaft 1i extending through the shaft 64 and inner eccentrics 66 coaxially of their journal portions 61.

The eccentrics E52 and 63 shown in Figs. 2 and 3 are rotated in synchronism by means of gears secured to one end of their supporting shafts 64. As this 'part of the construction forms no part of the present invention, further description is not thought to be necessary. It will sufiice to state that a worm 16 supported horizontally within the cover plate 58 when rotated will slowly rotate the eccentrics 62 and 63 simultaneously and will therefore actuate the movable spindle head 20 in a closed arcuate path. The Worm it by means of which the eccentrics 62 and 63 are rotated may be manually rotated by a hand wheel H on the forward end of its shaft'lii. If desired, however, a small motor 13 may be mounted on a portion of the fixed head It drivingly connected to the Worm shaft 18 through suitable telescoping and jointed connections. The means to vary the radius of the arcuate movement of the head 28 correspond closely to those described in the above referred to patents, and therefore will not need to be further described.

It has been found that due to unavoidable inaccuracies in manufacture or inaccurate alinement and adjustment of the parts supporting the movable head 20 that a cramping action may ocour in the bearings for the head which prevents smooth and easy rotation of the eccentric driving mechanism to move the tool 23 in an arcuate path. It is therefore a primary feature of the present invention to eliminate the possibility of the eccentrics 62 and 63, upon which the movable head 29 is supported, becoming cramped by lack of accurate adjustment or misalinement or unavoidable errors in manufacture. With the possibility of the eccentrics becoming cramped eliminated, uniformly free movement of the head 29 is assured. As shown in Fig. 2, the eccentric sleeve 62 adjacent the cutter spindle 2! is directly mounted within a fixed cylindrical surface formed directly within the movable head 20. This front eccentric 62, therefore, accurately controls the vertical and lateral positions of the cutter head 20 at all times. The rear eccentric 63 more remote from the cutter spindle 2| is mounted within the head 20 by a special and improved bearing member and support shown clearly in Fig. 2.

It will be seen by reference to Fig. 2 that the movable head 20 is cut away to form an enlarged recess surrounding the sleeve 63 forming the rear eccentric, therebeing a small arcuate surface 86 only integral with the movable head 25 and bearing against the lowermost portion of. sleeve 63. The upper surface of the eccentric sleeve 53 upon which the weight of the movable head 20 is principally supported bears against an inserted arcuate member 81 conforming to the surface of the eccentric and which is so mounted within the head 20 that it is free to adjust itself within limited distances either laterally or by tilting or by movement angularly about a vertical axis.

Preferably this arcuate bearing member 81 may have a central recess 88 within its upper portion within which may loosely fit a vertically disposed stud 89 adjustably threaded within the movable head 20. A ball 99 of relatively large diameter inserted within the recess 88 and within the recessed lower end of the stud 89 is positioned between bearing plates 9! one plate being mounted in the arcuate member 8! and the other directly thereabove in the stud 89. With this construction and with the ball 93 forming the weight supporting member, the arcuate member 8'! is free to tilt slightly about a horizontal axis or about a vertical axis or may move slightly laterally within the recess 88. By means of this freedom of movement cramping action between the eccentric sleeves 62 and 63 and the movable head 20 in any adjustment or in any driving position thereof is prevented.

What I claim is: i

l. A die sinking machine comprising in combination, a base, a head having a tool spindle,

slidably and rotatably mounted therein, means for moving said head in a closed path while maintaining said spindle in parallel positions, a pair of spaced adjustable eccentrics for movably supporting said head in said base, said head having a bearing surface directly engaging one of said eccentrics, a pivotal member supported for limited movement within said head engaging the other of said eccentrics, and means to simultaneously rotate said eccentrics.

2. A die sinking machine comprising in com.- bination, a base, a head having a tool spindle slidably and rotatably mounted therein, means for moving said head in a closed path while maintaining said spindle in parallel positions, a pair of spaced adjustable eccentrics for movably supporting said head in said base, said head having a fixed cylindrical bearing surface directly engaging one of said eccentrics, a member supported for limited lateral and pivotal movements.

within said head engaging the other of said eccentrics, and means to simultaneously rotate said eccentrics.

3. A die sinking machine comprising in combination, a base, a head having a tool spindle slidably and rotatably mounted therein, means for moving said head in a closed path while maintaining said spindle in parallel positions, adjustable eccentrics for movably supporting said head in said base, said head having an integral cylindrical-surface directly. engaging one of said eccentrics, an arcuate member adju tably mounted for limited movement in any direction engagadjustable eccentrics for movably supporting said head in said base, said head having an integral cylindrical surface directly engaging one of said eccentrics, an arcuate member adjustably mounted for limited movement laterally and pivotally in any direction engaging the other of said eccentrics, and means to simultaneously rotate said eccentrics.

5. A die sinking machine comprising in com bination, a base, a head having a tool spindle slidably and rotatably mounted therein, means for moving said head in a closed path while maintaining said spindle in parallel positions, adjustable eccentrics for movably supporting said head in said base, said head having an integral cylindrical surface directly engaging one of said eccentrics, an arcuate member adjustably mounted for limited movement laterally and pivotally in any direction engaging the upper portion only of the other of said eccentrics, and means to simultaneously rotate said eccentrics.

6. A die sinking machine comprising in combination, a base, a head having a tool spindle slidably and rotatably mounted therein, means for moving said head in a closed path while maintaining said spindle in parallel positions, adjustable eccentrics for movably supporting said head in said base, said head having an integral cylindrical surface directly engaging one of said eccentrics, an integral arcuate portion of said head engaging the lower portion of the other of said eccentrics, a member adjustably mounted for limited movement laterally and pivotally in any direction engaging the upper portion only of said last mentioned eccentric, and means to simultaneously rotate said eccentrics.

JOHN M. RUSNAK. 

